This name is a synonym of Centaurium erythraea subsp. limoniiforme (Greuter) Greuter.
The record derives from WCSP (in review)
(data supplied on 2012-03-23)
which reports it as a synonym with original publication details: Bot. J. Linn. Soc. 65: 235 1972.
This name was in version 1 of The Plant List, record kew-2708650, and has not been changed.